Clear Cell DatagridView in Cell Validating event

Hi,

I want to know how to delete a cell datagridview value in Cell validating event after or before setting e.cancel to true.

I tried the following:

1- Datgridview.Item(e.columnIndex, e.RowIndex).Value = System.Dbnull.Value

2- Datagridview.CurrentCell.value = system.dbnull.value

But they did not work. Can Anyone help me please,

Thank you